CN111981687B - Water heater, control method of water heater and storage medium - Google Patents
Water heater, control method of water heater and storage medium Download PDFInfo
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- CN111981687B CN111981687B CN201910427361.7A CN201910427361A CN111981687B CN 111981687 B CN111981687 B CN 111981687B CN 201910427361 A CN201910427361 A CN 201910427361A CN 111981687 B CN111981687 B CN 111981687B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H7/00—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release
- F24H7/02—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release the released heat being conveyed to a transfer fluid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/0005—Details for water heaters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/18—Arrangement or mounting of grates or heating means
- F24H9/1809—Arrangement or mounting of grates or heating means for water heaters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention provides a water heater, a control method of the water heater and a storage medium, wherein the water heater comprises: the heating device is internally provided with fluid; the heat storage device is communicated with the heating device, and the fluid flows to the heat storage device after being heated in the heating device so as to enable the heat storage device to store heat; wherein, the quantity of heat accumulation device is two at least, all is provided with inlet tube and outlet pipe on arbitrary heat accumulation device. According to the water heater provided by the invention, water flow enters from the water inlet pipe, passes through the heat storage device and exchanges heat with the heat storage device, hot water flows out from the water outlet pipe, the heat storage device does not need to store water, the volume of the heat storage device can be obviously reduced, and when hot water is needed, cold water entering from the water inlet pipe directly passes through the heat storage device and then flows out from the water outlet pipe, so that the function of heating running water is realized. In addition, the number of the heat storage devices is at least two, and any one heat storage device is provided with a water inlet pipe and a water outlet pipe, so that the at least two heat storage devices can be respectively placed in different spaces.
Description
Technical Field
The invention relates to the technical field of household appliances, in particular to a water heater, a control method of the water heater and a storage medium.
Background
At present, the water heaters mainly comprise a gas water heater, an electric water heater and an air energy water heater, and the air energy water heater is more and more concerned by people due to higher energy efficiency; the electric water heater cannot realize water-electricity separation due to direct contact between electric heating and water, so that electric shock risks exist; the air energy water heater is mainly of a static heating type at present, the static heating type utilizes a water tank with a certain volume, generally 150L/200L and the like, heat is stored in the water tank in a sensible heat mode, the water tank with the larger volume usually occupies the residential area of a family, meanwhile, the heating speed and the heating efficiency of a heat pump system are greatly influenced by the temperature of the external environment, and when the temperature of the outdoor environment is lower, the heating speed of the whole machine can be obviously reduced.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art or the related art.
To this end, a first aspect of the invention provides a water heater.
The second aspect of the invention also provides a control method of the water heater.
A third aspect of the invention also provides a computer-readable storage medium.
In view of the above, a first aspect of the present invention provides a water heater, comprising: the heating device is internally provided with fluid; the heat storage device is communicated with the heating device, and the fluid flows to the heat storage device after being heated in the heating device so as to enable the heat storage device to store heat; wherein, the quantity of heat accumulation device is two at least, all is provided with inlet tube and outlet pipe on arbitrary heat accumulation device.
The water heater provided by the invention comprises a heating device and a heat storage device, wherein the heating device can heat the heat storage device to enable the heat storage device to store heat energy, the heat storage device comprises a water inlet pipe and a water outlet pipe, water flows enter from the water inlet pipe, pass through the heat storage device and exchange heat with the heat storage device, and flow out hot water from the water outlet pipe. In addition, the quantity of the heat storage devices is at least two, the water consumption of a user is greatly increased by the at least two heat storage devices, a water inlet pipe and a water outlet pipe are arranged on any one heat storage device, and the at least two heat storage devices can be placed in different spaces respectively for the user to use in different spaces. Meanwhile, the heating device and the heat storage device are separately installed, so that the noise-free inner side heat storage and water utilization part can be realized, the use comfort of a user is improved, the heat storage device can be installed in a visible mode or in a hidden mode, and the use space of the user is saved.
According to the water heater provided by the invention, the following additional technical characteristics can be provided:
in the above technical solution, preferably, at least two thermal storage devices are connected in parallel.
In the technical scheme, at least two heat storage devices are connected in parallel, when the water heater is heated, the heat storage devices connected in parallel can be heated simultaneously, the heat storage speed of the heat storage devices is improved, the phenomenon that the heat of fluid gradually decreases when the fluid sequentially passes through the heat storage devices, and the heat storage amount of the heat storage device passing through at last is insufficient is avoided, when the water is used, the water can be used in different spaces by a user, and the user can heat a plurality of heat storage devices only through one heating device, so that the universality of the water heater is improved. Of course, the at least two heat storage devices may also be connected in series with each other, i.e. in a series-parallel hybrid connection, i.e. a connection in which the above-mentioned series connection and parallel connection are mixed together, i.e. a series connection, i.e. a connection in which, during heating, the fluid flows back into the housing after passing through the at least two heat storage devices in sequence.
In any one of the above aspects, preferably, the thermal storage device includes: the shell is filled with a phase change material; the heat exchanger is arranged in the shell, a heat storage flow path and a heat exchange water path are arranged in the heat exchanger in a crossed mode, the phase-change material is filled between the heat storage flow path and the heat exchange water path, the heat storage flow path is communicated with the heating device, and the heat exchange water path is communicated with the water inlet pipe and the water outlet pipe.
In the technical scheme, the heat storage device comprises a shell and a heat exchanger arranged in the shell, a heat storage flow path and a heat exchange water path are arranged in the heat exchanger in a crossed manner, a phase-change material is filled between the heat exchange water path and the heat storage flow path, the phase-change material is used for realizing the heat exchange of fluid and the phase-change material, the heat storage flow path is communicated with the heating device, the fluid exchanges heat with the phase-change material through the heat storage flow path, heat is stored in the phase-change material, the heat exchange water path is communicated with a water inlet pipe and a water outlet pipe, water flows into the heat exchange water path through the water inlet pipe, hot water flows out of the water outlet pipe after exchanging heat with the phase-change material, the water demand of a user is met, meanwhile, the fluid and the water respectively flow into the heat storage flow path and the heat exchange water path, namely the heating pipeline and the water pipeline are separated, the water separation is realized, and the water safety is ensured.
In any of the above technical solutions, preferably, the heating device includes: the heat storage device comprises a shell, a first pipeline and a second pipeline, wherein fluid is contained in the shell, the shell is connected with the first pipeline and the second pipeline, and two ends of the first pipeline and two ends of the second pipeline are respectively connected with the shell and a heat storage flow path of the heat storage device; the heating structure is arranged in the shell and used for heating fluid; and the driving structure is arranged on the first pipeline or the second pipeline and is used for driving the fluid to flow from the shell to the heat storage device so as to store heat in the heat storage device.
In this technical scheme, heating device includes the casing and sets up the heating structure in the casing and set up the drive structure outside the casing, and the heating structure is used for heating the fluid in the casing, and the drive structure is used for driving the fluid that is heated to flow to the heat accumulation device to carry out the heat accumulation to the heat accumulation device. Wherein, the casing outside is connected with first pipeline and second pipeline, and first pipeline and second pipeline all are linked together with the casing to the fluid passes through, correspond first pipeline on the heat accumulation device and be provided with the inlet, correspond the second pipeline and be provided with the liquid outlet, first pipeline communicates casing and inlet respectively, and the second pipeline communicates casing and liquid outlet respectively, in order to realize fluidic circulation flow. Specifically, in order to realize the parallel connection of at least two heat storage devices, a plurality of first branch pipes are arranged on the first pipeline and used for being connected with the liquid inlet, and a plurality of second branch pipes are arranged on the second pipeline and used for being connected with the liquid outlet.
Further, the driving structure is a water pump or other pump device.
In any one of the above technical solutions, preferably, the heating device further includes: and the control structure is arranged on the outer side of the shell and is connected with the heating structure and the driving structure.
In the technical scheme, the heating device further comprises a control structure, wherein the control structure is installed on the outer side of the shell, is connected with the heating structure and the driving structure and is used for controlling the heating structure and the driving structure to work.
In any one of the above technical solutions, preferably, the water heater further includes: and the first detection structure is arranged in the heat storage device and used for detecting the temperature of the phase-change material.
In the technical scheme, the water heater further comprises a first detection structure, wherein the first detection structure is arranged in the heat storage device and used for detecting the temperature of the phase-change material so as to judge whether the heating action is finished or whether the phase-change material needs to be heated according to the temperature in the phase-change material.
In any one of the above technical solutions, preferably, the water heater further includes: and the second detection structure is arranged on one side of the first pipeline close to the heat storage flow path and used for detecting the temperature of the fluid flowing to the heat storage flow path.
In this technical scheme, the water heater still includes that the second detects the structure, sets up in one side that first pipeline is close to the heat accumulation flow path, and furtherly, the second detects the structure and sets up in inlet department for detect the fluid temperature of the heat accumulation flow path that the flow direction corresponds with the inlet, avoid flowing to phase change material's fluid temperature too high and influence phase change material's that leads to stability, also can regard as trigger condition, open the heating structure when the fluid temperature that advances the inlet crosses lowly.
In any one of the above technical solutions, preferably, the water heater further includes: and the third detection structure is arranged on one side, close to the heat storage flow path, of the second pipeline and is used for detecting the temperature of the fluid flowing out of the heat storage flow path.
In this technical scheme, the water heater still includes that the third detects the structure, sets up in the second pipeline and is close to one side of heat accumulation flow path, and furtherly, the third detects the structure and sets up in liquid outlet department for detect the temperature of the fluid that flows out the heat accumulation flow path that corresponds with the liquid outlet, and then can judge whether heating is accomplished.
Further, the first detection structure, the second detection structure and the third detection structure are temperature sensors or temperature sensing bulbs.
In any one of the above technical solutions, preferably, the water heater further includes: and the at least two valve bodies are arranged on the first pipeline or the second pipeline and respectively correspond to any two heat exchange devices in the at least two heat exchange devices.
In the technical scheme, the water heater further comprises valve bodies, the valve bodies are arranged on the first pipeline or the second pipeline, the number of the valve bodies is at least two, further, the number of the valve bodies is the same as that of the heat exchange devices, and the valve bodies and the heat storage flow paths are arranged in one-to-one correspondence and used for controlling the on-off of the heat storage flow paths corresponding to the valve bodies.
In any of the above technical solutions, preferably, the valve body is an electromagnetic valve.
In this technical scheme, the valve body is the solenoid valve, and further, the valve body is one-way solenoid valve.
In any of the above technical solutions, preferably, the phase transition temperature of the phase change material is greater than or equal to 45 ℃ and less than or equal to 80 ℃.
In the technical scheme, the phase change temperature of the phase change material is greater than or equal to 45 ℃ and less than or equal to 80 ℃, and compared with a water storage type heat pump water heater, the volume of the water heater provided by the application is reduced by more than 45% compared with that of the water storage type heat pump water heater on the premise of providing hot water with the same volume.
In any of the above technical solutions, preferably, the fluid is water or heat transfer oil.
In the technical scheme, the fluid is water or heat conduction oil or other Newtonian fluids.
The water heater comprises two or more heat storage devices and a heating device, wherein the heat storage devices and the heating device are arranged separately, and the heating device is used for storing heat for the heat storage devices and storing the heat in the heat storage devices. The heat storage device is uniformly filled with a phase-change material with high enthalpy, the phase-change temperature is 45-80 ℃, and compared with a water storage type heat pump water heater, the volume of the heat storage device is reduced by more than 45% on the premise of providing hot water with the same volume.
The heating device comprises a fluid, preferably water or heat conducting oil and the like, is used for flowing and transferring heat in a heat storage flow path, and further comprises a shell, a heating structure, a control structure and a water pump, wherein the fluid is stored in the shell, the heating structure is used for heating the fluid, the control structure is used for controlling the operation of all parts of the heating device, the water pump is used for driving the fluid to flow in the heat storage flow path, the heating device is connected with each heat storage device through a first pipeline and a second pipeline, a heat exchanger is arranged in each heat storage device, and the heat exchanger is provided with a heat storage flow path and a heat exchange water path which are arranged in a crossed mode. Each heat storage device is provided with a water inlet pipe and a water outlet pipe, the water inlet pipe and the water outlet pipe are connected to a heat exchanger of the heat storage water pipe, cold water enters the heat storage water pipe from the water inlet pipe and exchanges heat with the internal phase-change material, and hot water with the increased temperature reaches a water using terminal from the water outlet pipe. A temperature sensing bulb is arranged in the heat storage water pipe, detects the temperature of the phase change material, and judges whether the heat storage of the heat storage water pipe is finished or not.
Specifically, an electromagnetic valve is arranged on a liquid inlet or a liquid outlet of a heat storage flow path of each heat storage device and used for controlling the on-off of the heat storage flow path of the heat storage device, and temperature sensing bags are respectively arranged on connecting pipes of the liquid inlet and the liquid outlet of the heat storage flow path and used for controlling the operation and the output of the heating device.
According to the second aspect of the present invention, there is also provided a control method for a water heater including a heating device and a heat storage device communicated with the heating device, the control method including: acquiring a first temperature in the heat storage device in real time; and controlling the heating device to work according to the first temperature.
The control method of the water heater provided by the second aspect of the invention obtains the first temperature in the heat storage device in real time to obtain the real-time temperature of the phase change material in the heat storage device, and further controls the heating device to work according to the first temperature, specifically, when the first temperature is lower, the temperature of the phase change material in the heat storage device is too low, and at the moment, the heating device is controlled to work to heat the heat storage device, so that heat is stored in the heat storage device in advance, the heat exchange effect during water use is ensured, and when the first temperature is too high, the heating device is correspondingly controlled to stop heating the fluid, so that the temperature of the phase change material in the heat storage device is prevented from being too high, the energy waste is avoided, and the electric energy is saved.
According to the control method of the water heater provided by the invention, the following additional technical characteristics can be provided:
in the foregoing technical solution, preferably, the heating device includes a driving structure and a heating structure, the heating structure is used for heating a fluid, the driving structure is used for driving the fluid to flow to the thermal storage device, and the step of controlling the heating device to operate according to the first temperature specifically includes: comparing the first temperature with the magnitude of the first temperature threshold; and controlling the heating structure and the driving structure to be started under the condition that the first temperature is confirmed to be less than or equal to the first temperature threshold value.
In this technical scheme, heating device includes drive arrangement and heating structure, and the step of controlling heating device work according to first temperature specifically includes: comparing the first temperature with the first temperature threshold value, under the condition that the first temperature is less than or equal to the first temperature threshold value, namely the temperature in the heat storage device is too low, correspondingly starting the heating structure to heat the fluid, and simultaneously starting the driving structure to drive the heated fluid so as to enable the heated fluid to flow into the heat storage device for heat exchange, so that the heat is stored in the heat storage device in advance, the heat can be used by a user at any time, and the water demand of the user is ensured. The first temperature threshold may be 80 ℃ or another temperature value that a user wants to set, and may be set in the control program in advance, or set by the user.
In any one of the above technical solutions, preferably, the heat storage device has a liquid inlet and a liquid outlet communicated with the heating device, the liquid inlet or the liquid outlet is provided with a valve body, and the control method further includes: acquiring a second temperature of the liquid inlet in real time; and controlling the heating structure to work according to the second temperature.
In this technical scheme, when detecting the first temperature in the heat accumulation device, carry out real-time detection to the second temperature of inlet to obtain the temperature of the fluid that flows into in the phase change material, and according to the work of second temperature control heating structure, avoid the second high temperature of inlet to cross the stability in order to influence phase change material, can also open heating structure when the second temperature of inlet is low excessively, with the heating to the heat accumulation device.
In any of the above technical solutions, preferably, the step of controlling the heating structure to operate according to the second temperature specifically includes: comparing the second temperature with the magnitude of the second temperature threshold; controlling the heating structure to be closed under the condition that the second temperature is confirmed to be greater than or equal to the second temperature threshold value; comparing the second temperature with a third temperature threshold; controlling the heating structure to be started under the condition that the second temperature is less than or equal to the third temperature; wherein the third temperature threshold is less than the second temperature threshold.
In the technical scheme, the second temperature and the second temperature threshold are compared, when the second temperature is higher than the second temperature threshold, the temperature of the fluid flowing to the heat storage device is too high, the heating structure is controlled to be closed, the situation that the stability of the phase-change material is influenced by the too high temperature of the fluid is avoided, after the heating structure is closed, the driving structure still runs, the fluid is driven to flow to the heat storage device and exchange heat with the heat storage device, in the heat exchange process, the temperature of the fluid is gradually reduced, and when the temperature of the fluid flowing to the heat storage device is lower than the third temperature threshold, namely the second temperature is lower than the third temperature threshold, the heating structure is controlled to be opened, so that the heat storage device is continuously stored. Wherein the third temperature threshold is less than the second temperature threshold.
In any of the above technical solutions, preferably, the method further includes: comparing the magnitude of the first temperature and the first temperature threshold; under the condition that the first temperature is confirmed to be greater than or equal to the first temperature threshold value, acquiring a third temperature of the liquid outlet in real time; comparing the third temperature with a fourth temperature threshold; controlling the driving structure to operate for a first preset time under the condition that the third temperature is determined to be greater than or equal to the fourth temperature threshold; the valve body is controlled to close the liquid inlet, and the driving structure is controlled to stop running; wherein the third temperature threshold is equal to the difference between the first temperature threshold and the temperature return difference.
In the technical scheme, the first temperature and the first temperature threshold are compared, under the condition that the first temperature is confirmed to be greater than or equal to the first temperature threshold, the third temperature of the liquid outlet is obtained in real time at the moment, the third temperature of the fluid flowing out of the heat storage device is compared with the fourth temperature threshold, whether the heat storage device completes heat storage is judged according to the temperature of the fluid flowing out of the heat storage device, specifically, under the condition that the third temperature is confirmed to be greater than or equal to the fourth temperature threshold, the driving structure is controlled to operate for a first preset time, namely, when the third temperature is greater than or equal to the fourth temperature threshold, timing is started, the valve body and the driving structure are closed after the first preset time is timed, the heat storage device completes heat storage, and the first preset time can be set in advance for 5 seconds, 10 seconds and the like. The third temperature threshold is equal to the difference between the first temperature threshold and the temperature return difference, the first temperature is the temperature in the heat storage device, and may be the temperature at the center of the heat storage device or the temperature at the lower part or the temperature at the upper part, the fluid continuously exchanges heat with the phase-change material in the process of flowing from the liquid inlet to the liquid outlet of the heat storage device, so that the temperature difference exists in the process of flowing from the liquid inlet to the liquid outlet, and the temperature difference also exists in the process of flowing from the position of the first temperature to the liquid outlet, for example, when the temperature of the liquid outlet reaches 48 ℃, the detected first temperature may reach 52 ℃, and the valve body and the pump body are closed when the third temperature of the liquid outlet reaches the difference between the first temperature threshold and the temperature return difference, so that the final temperature in the heat storage device after the operation for the first preset time is the first temperature threshold. Further, the temperature return difference can be preset.
Further, the number of the heat storage devices is at least two, and the heating structure and the driving structure are controlled to stop operating after all the heat storage devices complete heat storage.
In any one of the above aspects, preferably, the number of the thermal storage devices is at least two, and the control method further includes: acquiring a quick heating instruction of a user; and controlling the valve body corresponding to the heat storage device indicated by the quick heating instruction to open according to the quick heating instruction.
In the technical scheme, the number of the heat storage devices is at least two, when a certain specific heat storage device needs quick heating, the heating structure and the driving structure operate, the valve body corresponding to the heat storage device indicated by the quick heating instruction is opened, the valve bodies on other heat storage devices are closed, only the heat storage device indicated by the quick heating instruction is heated, and after the heat storage device completes heat storage, the heating structure and the driving structure are closed, so that the purpose of quick heating is achieved.
According to a third aspect of the present invention, there is provided a computer readable storage medium, on which a computer program is stored, wherein the computer program, when being executed by a processor, implements the steps of the method according to any of the above technical solutions, thereby achieving all the technical effects of the control method for a water heater, and the details of which are not repeated herein.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 shows a schematic structural diagram of a water heater according to an embodiment of the present invention;
fig. 2 is a schematic structural view showing a thermal storage device according to an embodiment of the present invention;
FIG. 3 shows a flow chart diagram of a control method of a water heater according to an embodiment of the invention;
FIG. 4 illustrates another flow diagram of a method of controlling a water heater according to one embodiment of the present invention;
FIG. 5 is a further flow chart diagram of a method of controlling a water heater according to one embodiment of the present invention;
FIG. 6 is a further flow chart illustrating a method of controlling a water heater according to an embodiment of the present invention;
fig. 7 shows another flow chart of a control method of a water heater according to an embodiment of the invention.
The correspondence between the marks and the names of the components in fig. 1 and 2 is as follows:
the heat storage device comprises a heating device 1, a shell 10, a heating structure 12, a driving structure 14, a control structure 16, a first pipeline 18, a second pipeline 19, a heat storage device 2, a water outlet pipe 20, a water inlet pipe 21, a shell 22, a heat exchanger 23, a first detection structure 24, a second detection structure 25, a third detection structure 26 and a valve body 27.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
A water heater and a control method of the water heater and a storage medium according to some embodiments of the present invention are described below with reference to fig. 1 to 7.
According to an embodiment of the first aspect of the invention, the invention proposes a water heater comprising: the heating device 1 is provided with fluid inside; a thermal storage device 2 that communicates with the heating device 1, and in which fluid is heated in the heating device 1 and then flows to the thermal storage device 2 to store heat in the thermal storage device 2; the number of the heat storage devices 2 is at least two, and any one of the heat storage devices 2 is provided with a water inlet pipe 21 and a water outlet pipe 20.
As shown in fig. 1, the water heater provided by the invention comprises a heating device 1 and a heat storage device 2, wherein the heating device 1 can heat the heat storage device 2 to store heat energy in the heat storage device 2, the heat storage device 2 comprises a water inlet pipe 21 and a water outlet pipe 20, water flows in from the water inlet pipe 21, passes through the heat storage device 2 and exchanges heat with the heat storage device 2, and hot water flows out from the water outlet pipe 20, in the whole process, the heat storage device 2 does not need to store water, the volume of the heat storage device 2 can be obviously reduced, when hot water is needed, cold water entering from the water inlet pipe 21 directly passes through the heat storage device 2 and then flows out from the water outlet pipe 20, the function of heating running water is realized, the requirement of quick water use of a user is met, and the water health is guaranteed. In addition, the number of the heat storage devices 2 is at least two, the water consumption of users is greatly increased by at least two heat storage devices 2, and any one heat storage device 2 is provided with a water inlet pipe 21 and a water outlet pipe 20, so that at least two heat storage devices 2 can be respectively placed in different spaces for users to use in different spaces. Meanwhile, the heating device 1 and the heat storage device 2 are separately installed, so that no noise can be generated in the inner side heat storage and water utilization part, the use comfort of a user is improved, and the heat storage device 2 can be installed in a visible mode or a hidden mode, so that the use space of the user is saved.
In the above embodiment, preferably, at least two thermal storage devices 2 are connected in parallel.
As shown in fig. 1, in this embodiment, at least two heat storage devices 2 are connected in parallel, and when heating, the heat storage devices 2 connected in parallel can be heated simultaneously, so that the heat storage speed of the heat storage devices 2 is increased, the situation that the heat of fluid gradually decreases when passing through the heat storage devices 2 in sequence, and the heat storage device 2 passing through last is insufficient is avoided, when water is used, a user can use water in different spaces, and the user can heat a plurality of heat storage devices 2 only through one heating device 1, so that the universality of the water heater is improved. Of course, the at least two heat storage devices 2 may also be connected in series with each other, i.e. in a series-parallel hybrid connection, i.e. a hybrid connection in which the series connection and the parallel connection are mixed together, i.e. a series connection, i.e. a series-parallel connection, in which the fluid flows through the at least two heat storage devices 2 in sequence and then flows back into the housing 10 during heating.
In any of the above embodiments, preferably, the thermal storage device 2 includes: the shell 22, the shell 22 is filled with phase-change materials; and a heat exchanger 23 disposed in the housing 22, wherein a heat storage flow path (not shown) and a heat exchange water path (not shown) are disposed in the heat exchanger 23 in a crossing manner, the phase-change material is filled between the heat storage flow path and the heat exchange water path, the heat storage flow path is communicated with the heating device 1, and the heat exchange water path is communicated with the water inlet pipe 21 and the water outlet pipe 20.
As shown in fig. 2, in this embodiment, the heat storage device 2 includes a housing 22 and a heat exchanger 23 disposed in the housing 22, a heat storage flow path and a heat exchange water path are alternately disposed in the heat exchanger 23, and a phase-change material is filled between the heat exchange water path and the heat storage flow path for heat exchange between a fluid and water, the heat storage flow path is communicated with the heating device 1, the fluid exchanges heat with the phase-change material through the heat storage flow path to store heat in the phase-change material, the heat exchange water path is communicated with the water inlet pipe 21 and the water outlet pipe 20, a water flow enters the heat exchange water path from the water inlet pipe 21 and is changed into hot water after exchanging heat with the phase-change material, and the hot water flows out from the water outlet pipe 20, so as to meet the water demand of a user.
In any of the above embodiments, preferably, the heating device 1 includes: the heat storage device comprises a shell 10, wherein fluid is contained in the shell 10, a first pipeline 18 and a second pipeline 19 are connected to the shell 10, and two ends of the first pipeline 18 and two ends of the second pipeline 19 are respectively connected with the shell 10 and a heat storage flow path; a heating structure 12 disposed within the housing 10 for heating the fluid; and a driving structure 14 provided on the first pipe 18 or the second pipe 19 for driving a fluid to flow from the housing 10 to the thermal storage device 2 to store heat in the thermal storage device 2.
As shown in fig. 1, in this embodiment, the heating device 1 includes a housing 10, a heating structure 12 disposed inside the housing 10, and a driving structure 14 disposed outside the housing 10, the heating structure 12 being used to heat fluid inside the housing 10, and the driving structure 14 being used to drive the heated fluid toward the thermal storage device 2 to store heat in the thermal storage device 2. Wherein, the casing 10 outside is connected with first pipeline 18 and second pipeline 19, and first pipeline 18 and second pipeline 19 all are linked together with casing 10 to the fluid passes through, is provided with the inlet corresponding to first pipeline 18 on the heat accumulation device 2, is provided with the liquid outlet corresponding to second pipeline 19, and first pipeline 18 communicates casing 10 and inlet respectively, and second pipeline 19 communicates casing 10 and liquid outlet respectively, in order to realize fluidic circulation flow. Specifically, in order to realize the parallel connection of at least two heat storage devices 2, the first pipeline 18 is provided with a plurality of first branch pipes for connecting the liquid inlet, and the second pipeline 19 is provided with a plurality of second branch pipes for connecting the liquid outlet.
Further, the drive structure 14 is a water pump or other pump device.
In any of the above embodiments, preferably, the heating device 1 further includes: and a control structure 16 installed outside the housing 10, wherein the control structure 16 is connected with the heating structure 12 and the driving structure 14.
In this embodiment, the heating device 1 further comprises a control structure 16, and the control structure 16 is mounted outside the housing 10 and connected to the heating structure 12 and the driving structure 14 for controlling the operation of the heating structure 12 and the driving structure 14.
In any of the above embodiments, preferably, the water heater further includes: a first sensing structure 24 is disposed within the housing 22 for sensing the temperature of the phase change material.
In this embodiment, the water heater further includes a first sensing structure 24, the first sensing structure 24 being disposed within the housing 22 for sensing the temperature of the phase change material to determine whether the heating action is complete or whether the phase change material requires heating based on the temperature within the phase change material.
In any of the above embodiments, preferably, the water heater further includes: and a second detection structure 25, provided on the side of the first pipe 18 close to the heat storage flow path, for detecting the temperature of the fluid flowing to the heat storage flow path.
In this embodiment, the water heater further includes a second detecting structure 25 disposed at a side of the first pipe 18 close to the heat storage flow path, and further, the second detecting structure 25 is disposed at the liquid inlet and is used for detecting a temperature of the fluid flowing to the heat storage flow path corresponding to the liquid inlet, so as to avoid influence on stability of the phase change material caused by an excessively high temperature of the fluid flowing to the phase change material, and can also serve as a trigger condition to turn on the heating structure 12 when the temperature of the fluid flowing to the liquid inlet is excessively low.
In any of the above embodiments, preferably, the water heater further includes: a third sensing arrangement 26 is provided on the side of the second conduit 19 adjacent the thermal storage flow path for sensing the temperature of the fluid exiting the thermal storage flow path.
In this embodiment, the water heater further includes a third detecting structure 26 disposed on a side of the second pipe 19 close to the heat storage flow path, and further, the third detecting structure 26 is disposed at the liquid outlet for detecting a temperature of the fluid flowing out of the heat storage flow path corresponding to the liquid outlet, so as to determine whether the heating is completed or not.
Further, the first detecting structure 24, the second detecting structure 25 and the third detecting structure 26 are temperature sensors or temperature bulbs.
In any of the above embodiments, preferably, the water heater further includes: and at least two valve bodies 27 arranged on the first pipeline 18 and respectively corresponding to any two heat exchange devices in the at least two heat exchange devices.
In this embodiment, the water heater further includes a valve body 27, the valve body 27 is disposed on the first pipe 18 or the second pipe 19, the number of the valve bodies 27 is at least two, further, the number of the valve bodies 27 is the same as the number of the heat exchanging devices, and the valve bodies 27 are disposed in one-to-one correspondence with the heat storage flow paths for controlling the on-off of the heat storage flow paths corresponding thereto.
In any of the above embodiments, preferably, the valve body 27 is a solenoid valve.
In this embodiment, the valve body 27 is a solenoid valve, and further, the valve body 27 is a one-way solenoid valve.
In any of the above embodiments, preferably, the phase change temperature of the phase change material is 45 ℃ or higher and 80 ℃ or lower.
In the embodiment, the phase change temperature of the phase change material is greater than or equal to 45 ℃ and less than or equal to 80 ℃, and compared with a water storage type heat pump water heater, the volume of the water heater provided by the application is reduced by more than 45% compared with that of the water storage type heat pump water heater on the premise of providing hot water with the same volume.
In any of the above embodiments, preferably, the fluid is water or thermal oil.
In this embodiment, the fluid is water or thermal oil or other newtonian fluid.
Specifically, the water heater is composed of two or more heat storage devices 2 and a heating device 1, wherein the heat storage devices 2 and the heating device 1 are separately arranged, and the heating device 1 is used for storing heat for the heat storage devices 2 and storing the heat in the heat storage devices 2. The heat storage device 2 is uniformly filled with a phase-change material with high enthalpy, the phase-change temperature is 45-80 ℃, and compared with a water storage type heat pump water heater, the volume of the water storage type heat pump water heater is reduced by more than 45% on the premise of providing hot water with the same volume.
Specifically, the heating apparatus 1 contains a fluid, preferably water or heat transfer oil, for flowing heat transfer in a heat storage flow path, and further includes a housing 10 for storing the fluid, a heating structure 12 for heating the fluid, a control structure 16 for controlling the operation of the components of the heating apparatus 1, and a water pump for driving the fluid to flow in the heat storage flow path, the heating apparatus 1 is connected to each of the heat storage apparatuses 2 through a first pipe 18 and a second pipe 19, and a heat exchanger 23 is disposed in each of the heat storage apparatuses 2, wherein the heat exchanger 23 has a heat storage flow path and a heat exchange water path, which are arranged in a cross. Each heat storage device 2 is provided with a water inlet pipe 21 and a water outlet pipe 20, the water inlet pipe 21 and the water outlet pipe 20 are connected to a heat exchanger 23 of a heat storage water pipe, cold water enters the heat storage water pipe from the water inlet pipe 21 and exchanges heat with an internal phase change material, and hot water with increased temperature reaches a water using terminal from the water outlet pipe 20. A temperature sensing bulb is arranged in the heat storage water pipe, and the temperature sensing bulb detects the temperature of the phase change material and judges whether the heat storage of the heat storage water pipe is finished or not.
Specifically, an electromagnetic valve is arranged on a liquid inlet of the heat storage flow path of each heat storage device 2 and used for controlling the on-off of the heat storage flow path of the heat storage device 2, and temperature sensing bags are respectively arranged on connecting pipes of the liquid inlet and the liquid outlet of the heat storage flow path and used for controlling the operation and the output of the heating device 1.
Fig. 3 is a flow chart illustrating a control method of a water heater according to the present invention, as shown in fig. 3, the method includes:
step 302: acquiring a first temperature in the heat storage device in real time;
step 304: and controlling the heating device to work according to the first temperature.
The control method of the water heater provided by the second aspect of the invention obtains the first temperature in the heat storage device in real time to obtain the real-time temperature of the phase change material in the heat storage device, and further controls the heating device to work according to the first temperature, specifically, when the first temperature is lower, the temperature of the phase change material in the heat storage device is too low, and at the moment, the heating device is controlled to work to heat the heat storage device, so that heat is stored in the heat storage device in advance, the heat exchange effect during water use is ensured, and when the first temperature is too high, the heating device is correspondingly controlled to stop heating the fluid, so that the temperature of the phase change material in the heat storage device is prevented from being too high, the energy waste is avoided, and the electric energy is saved.
Fig. 4 shows another flow chart of the control method of the water heater of the invention, and as shown in fig. 4, the method comprises the following steps:
step 402: acquiring a first temperature in the heat storage device in real time;
step 404: whether the first temperature is lower than a first temperature threshold value or not, if so, jumping to a step 406, otherwise, returning to the step 402;
step 406: and controlling the heating structure and the driving structure to be opened.
In this embodiment, the heating device includes a driving device and a heating structure, and the step of controlling the heating device to operate according to the first temperature specifically includes: comparing the first temperature with the first temperature threshold value, under the condition that the first temperature is less than or equal to the first temperature threshold value, namely the temperature in the heat storage device is too low, correspondingly starting the heating structure to heat the fluid, and simultaneously starting the driving structure to drive the heated fluid so as to enable the heated fluid to flow into the heat storage device for heat exchange, so that the heat is stored in the heat storage device in advance, the heat can be used by a user at any time, and the water demand of the user is ensured. The first temperature threshold may be 80 ℃ or another temperature value that a user wants to set, and may be set in the control program in advance, or set by the user.
In any of the above embodiments, preferably, the heat storage device has a liquid inlet and a liquid outlet communicated with the heating device, the liquid inlet is provided with a valve body, and the control method further includes: acquiring a second temperature of the liquid inlet in real time; and controlling the heating structure to work according to the second temperature.
In this embodiment, when detecting the first temperature in the heat storage device, carry out real-time detection to the second temperature of inlet to obtain the temperature of the fluid that flows into in the phase change material, and according to the work of second temperature control heating structure, avoid the second temperature of inlet too high with the stability that influences the phase change material, can also open heating structure when the second temperature of inlet is crossed lowly, with the heating to the heat storage device.
Fig. 5 shows another flow chart of the control method of the water heater of the invention, as shown in fig. 5, the method comprises:
step 502: acquiring a first temperature in the heat storage device in real time;
step 504: whether the first temperature is less than or equal to a first temperature threshold value, if so, jumping to the step 506, otherwise, returning to the step 502;
step 506: controlling the heating structure and the driving structure to be started;
step 508: acquiring a second temperature of the liquid inlet in real time;
step 510: whether the second temperature is greater than or equal to a second temperature threshold; if yes, go to step 512, otherwise, go back to step 508;
step 512: controlling the heating structure to be closed;
step 514: whether the second temperature is less than or equal to a third temperature threshold; if yes, go to step 516, otherwise, go back to step 512;
step 516: and controlling the heating structure to be started.
In this embodiment, the magnitude of the second temperature and the magnitude of the second temperature threshold are compared, when the second temperature is greater than the second temperature threshold, the temperature of the fluid flowing to the thermal storage device is too high, the heating structure is controlled to be closed, the influence of the too high temperature of the fluid on the stability of the phase-change material is avoided, after the heating structure is closed, the driving structure is still in operation, the fluid is driven to flow to the thermal storage device and exchange heat with the thermal storage device, in the heat exchange process, the temperature of the fluid is gradually reduced, and when the temperature of the fluid flowing to the thermal storage device is less than the third temperature threshold, that is, when the second temperature is less than the third temperature threshold, the heating structure is controlled to be opened, so that the thermal storage device is continuously stored heat. Wherein the third temperature threshold is less than the second temperature threshold.
Fig. 6 is a schematic flow chart showing a control method of a water heater according to the present invention, as shown in fig. 6, the method includes:
step 602: acquiring a first temperature in the heat storage device in real time;
step 604: whether the first temperature is less than or equal to a first temperature threshold value, if so, jumping to step 606, otherwise, returning to step 602;
step 606: controlling the heating structure and the driving structure to be started;
step 608: acquiring a second temperature of the liquid inlet in real time;
step 610: whether the second temperature is greater than or equal to a second temperature threshold; if yes, go to step 612, otherwise, go back to step 608;
step 612: controlling the heating structure to be closed;
step 614: whether the second temperature is less than or equal to a third temperature threshold; if yes, go to step 616, otherwise, go back to step 612;
step 616: controlling the heating structure to be started;
step 618: whether the first temperature is greater than or equal to a first temperature threshold; if yes, jumping to step 620, otherwise, returning to step 616;
step 620: acquiring a third temperature of the liquid outlet in real time;
step 622: whether the third temperature is greater than or equal to a fourth temperature threshold; if yes, go to step 624, otherwise, go back to step 620;
step 624: the control valve body closes the liquid inlet and controls the driving structure to stop running.
In this embodiment, the first temperature and the first temperature threshold are compared, the third temperature of the liquid outlet is obtained in real time when it is determined that the first temperature is greater than or equal to the first temperature threshold, the third temperature of the fluid flowing out of the thermal storage device is compared with the fourth temperature threshold, whether the thermal storage device completes heat storage is determined according to the temperature of the fluid flowing out of the thermal storage device, specifically, when it is determined that the third temperature is greater than or equal to the fourth temperature threshold, the driving structure is controlled to operate for a first preset time, that is, when the third temperature is greater than or equal to the fourth temperature threshold, timing is started, the valve body and the driving structure are closed after the first preset time is timed, the thermal storage device completes heat storage, and the first preset time may be 5 seconds, 10 seconds, and the like which are set in advance. The third temperature threshold is equal to the difference between the first temperature threshold and the temperature return difference, the first temperature is the temperature in the heat storage device, and may be the temperature at the center of the heat storage device or the temperature at the lower part or the temperature at the upper part, the fluid continuously exchanges heat with the phase-change material in the process of flowing from the liquid inlet to the liquid outlet of the heat storage device, so that the temperature difference exists in the process of flowing from the liquid inlet to the liquid outlet, and the temperature difference also exists in the process of flowing from the position of the first temperature to the liquid outlet, for example, when the temperature of the liquid outlet reaches 48 ℃, the detected first temperature may reach 52 ℃, and the valve body and the pump body are closed when the third temperature of the liquid outlet reaches the difference between the first temperature threshold and the temperature return difference, so that the final temperature in the heat storage device after the operation for the first preset time is the first temperature threshold. Further, the temperature return difference can be preset.
Further, the number of the heat storage devices is at least two, and the heating structure and the driving structure are controlled to stop operating after all the heat storage devices complete heat storage.
Fig. 7 shows another flow chart of the control method of the water heater of the invention, and as shown in fig. 7, the method comprises the following steps:
step 702: acquiring a quick heating instruction of a user;
step 704: controlling the valve body corresponding to the heat storage device indicated by the quick heating instruction to open according to the quick heating instruction;
step 706: acquiring a second temperature of the liquid inlet in real time;
step 708: whether the second temperature is greater than or equal to a second temperature threshold; if yes, jumping to step 710, otherwise, returning to step 706;
step 710: controlling the heating structure to be closed;
step 712: whether the second temperature is less than or equal to a third temperature threshold; if yes, go to step 714, otherwise, go back to step 710;
step 714: controlling the heating structure to be started;
step 716: acquiring a first temperature in the heat storage device in real time;
step 718: whether the first temperature is greater than or equal to a first temperature threshold; if yes, go to step 720, otherwise, go back to step 716;
step 720: acquiring a third temperature of the liquid outlet in real time;
step 722: whether the third temperature is greater than or equal to a fourth temperature threshold; if yes, go to step 724, otherwise, go back to step 720;
step 724: the control valve body closes the liquid inlet, controls the driving structure to stop running, and controls the heating structure to close.
In this embodiment, the number of the heat storage devices is at least two, when a specific heat storage device needs quick heating, the heating structure and the driving structure operate, the valve body corresponding to the heat storage device indicated by the quick heating instruction is opened, the valve bodies on other heat storage devices are closed, only the heat storage device indicated by the quick heating instruction is heated, and after the heat storage device completes heat storage, the heating structure and the driving structure are closed, so that the purpose of quick heating is achieved.
Specifically, during a heating mode, the control device detects each parameter of the hot water system in real time, when a first temperature is detected to be lower than a first temperature threshold value, the driving structure and the heating structure operate at the moment, meanwhile, the system detects a second temperature of the liquid inlet, when the second temperature is larger than or equal to the second temperature threshold value, the heating structure stops heating, the phenomenon that the temperature of the liquid inlet is too high is avoided, when the second temperature is smaller than or equal to a third temperature threshold value, the heating structure is started to heat a medium, the heat storage device is heated, when the first temperature is higher than the first temperature threshold value, the system detects a third temperature of the liquid outlet, when the third temperature is larger than or equal to the difference between the first temperature threshold value and the temperature return difference, the driving structure operates for a first preset time, after the first preset time, at the moment, a valve body at the liquid inlet of a heating pipeline of the heat storage device is closed, and the heat storage device completes heat storage. And after all the heat storage devices in the system complete heat storage, the control device closes the heating structure and the driving structure and stops heating the heat storage devices.
Specifically, during the fast hot mode, when a certain specific heat storage device needs rapid heating, heating structure and drive structure operation this moment, the valve body of this heat storage device's inlet is opened, and the valve body of other heat storage device's inlet is closed, only heats specific heat storage device, and after this heat storage device reached the heat accumulation and accomplished the condition, heating structure and drive structure were closed, reached the purpose of rapid heating.
According to a third aspect of the present invention, there is provided a computer-readable storage medium, on which a computer program is stored, wherein the computer program, when being executed by a processor, implements the steps of the method according to any one of the above embodiments, thereby achieving all the technical effects of the method for controlling a water heater, which will not be described herein again.
In the present invention, the term "plurality" means two or more unless explicitly defined otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly and include, for example, fixed connections, detachable connections, or integral connections; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. A control method for a water heater including a heating device and a thermal storage device communicated with the heating device, the control method comprising:
acquiring a first temperature in the heat storage device in real time;
controlling the heating device to work according to the first temperature;
the heating device comprises a driving structure and a heating structure, the heating structure is used for heating fluid, the driving structure is used for driving the fluid to flow to the heat storage device, the heat storage device is provided with a liquid inlet and a liquid outlet which are communicated with the heating device, a valve body is arranged on the liquid inlet or the liquid outlet, and the control method further comprises the following steps:
acquiring a second temperature of the liquid inlet in real time;
controlling the heating structure to work according to the second temperature;
the step of controlling the heating structure to operate according to the second temperature specifically includes:
comparing the second temperature with a second temperature threshold value;
controlling the heating structure to be closed under the condition that the second temperature is confirmed to be greater than or equal to the second temperature threshold value;
comparing the second temperature with a third temperature threshold;
controlling the heating structure to be started under the condition that the second temperature is confirmed to be less than or equal to the third temperature threshold;
wherein the third temperature threshold is less than the second temperature threshold;
comparing the first temperature with a first temperature threshold value;
under the condition that the first temperature is confirmed to be greater than or equal to the first temperature threshold value, acquiring a third temperature of the liquid outlet in real time;
comparing the third temperature with a fourth temperature threshold;
controlling the driving structure to operate for a first preset time under the condition that the third temperature is determined to be greater than or equal to the fourth temperature threshold;
controlling the valve body to close the liquid inlet or the liquid outlet, and controlling the driving structure to stop running;
wherein the third temperature threshold is equal to a difference between the first temperature threshold and a temperature return difference.
2. The method for controlling a water heater according to claim 1, wherein the step of controlling the operation of the heating device according to the first temperature specifically comprises:
comparing the first temperature with the magnitude of the first temperature threshold;
and controlling the heating structure and the driving structure to be started under the condition that the first temperature is confirmed to be less than or equal to the first temperature threshold value.
3. The control method of a water heater according to claim 1, the number of the heat storage devices being at least two, characterized by further comprising:
acquiring a quick heating instruction of a user;
and controlling the valve body corresponding to the heat storage device indicated by the quick heating instruction to open according to the quick heating instruction.
4. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, implements a control method of a water heater according to any one of claims 1 to 3.
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| CN108361977A (en) * | 2018-03-05 | 2018-08-03 | 珠海格力电器股份有限公司 | The control method of heat pump water heater system and heat pump water heater system |
| CN108954823A (en) * | 2018-06-07 | 2018-12-07 | 合肥美的暖通设备有限公司 | Phase-change heat-storage Teat pump boiler and its control method and device, storage medium |
| CN208312700U (en) * | 2018-03-27 | 2019-01-01 | 芜湖美的厨卫电器制造有限公司 | A kind of phase transformation electric heater |
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| CN201555360U (en) * | 2009-11-06 | 2010-08-18 | 广东长菱空调冷气机制造有限公司 | Phase change thermal storage instant heating-type heat pump water heater |
| CN205717913U (en) * | 2016-04-25 | 2016-11-23 | 芜湖美的厨卫电器制造有限公司 | Phase-change heat-storage water heater |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108361977A (en) * | 2018-03-05 | 2018-08-03 | 珠海格力电器股份有限公司 | The control method of heat pump water heater system and heat pump water heater system |
| CN208312700U (en) * | 2018-03-27 | 2019-01-01 | 芜湖美的厨卫电器制造有限公司 | A kind of phase transformation electric heater |
| CN108954823A (en) * | 2018-06-07 | 2018-12-07 | 合肥美的暖通设备有限公司 | Phase-change heat-storage Teat pump boiler and its control method and device, storage medium |
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